Exhaust ventilator



Aug. 5, 1930. o. GIL-Es 1,772,140

EXHAUST VENTILATOR Filed July 1, 1929 3 sheejs-sheet 2 WWW .Bf-MMM Aug. 5, 1930. Q G|| Es 1,772,149 l EXHAUST VENTILATOR Filed July l, 1929 3 Sheets-Sheet 3 that discharge into railway7 NETE OWEN GILES, OF LONDQN, ENGLAND nxt-musa: vnnfrrmyron Application led July 1, 1929, Serial No.

This invention relates to exhaust ventilators oiE the kind comprising an uptake chamber the top of which communicates with downtake chambers provided with outlets the exhaust passages ot the ventilator, and has for its object to improve the construction and arrangement of such ventilators so as to increase the eiiiciency thereoiand to adapt the same for use with and other vehicles in order to prevent the entry of sparks, rain, blacks, dust etc., into the vehicle through the ventilator.

According to this invention the casing oi an exhaust ventilator of the kind referred to 1 is internally subdivided by a pair or horizontally disposed perforated platforms so as to :torni upper and lower air spaces, and by vertical baille plates arranged between such platforms so as to term inner and ont-er chambers,

Y ot which the'inner chamber comprises the central uptake, while the outer chamber comprises the exhaust passages and openings and the downtake chambers which communicate with the central uptake through the upper air space and are provided with outlets that discharge into the exhaust passages of the outer chamber.

The invention is illustrated in the accompanying drawings wherein similar references indicate like parts.

Figure l is a side view in halt section on the line I-I (Figure 2), and Figurer?d a sectional plan on the line lll-ll (Figure l), while Figure 3 is an end view in halt section on the line Ill- III (Figure 4), and Figure a a sectional plan on the line IV-IV (Figure 3), of one construction of exhaust ventilator in accordance with the present invention.

Figure 5 is a side view in half section and Figure 6 a sectional plan on thel line VI-VI (Figure 5) ot a modified construction of exhaust ventilator in accordance with the present invention.

As indicated in t-he drawings the ventilator consists of a casing a furnished with vertical exhaust openings b and mounted on a base plate c that is perforated as indicated at cl to -orm the uptake ot the ventilator.

The casing a is internally subdivided by 375,205, andvin Great Britain July 14, 1928.

horizontally disposed perforated upper and lower platforms e and and vertical baille plates g and m which are fitted between such platforms so as to form the central uptake chamber it and the downtake chambersV c and 55 exhaust passages 0 of the ventilator.

The platitorms @and f are arranged in the casing a so as to 'form upper and lower air spaces p and g' which are connected by the central uptake chamber it. 33

The lower air space g is connected to the inlet of the ventilator through the perforated base plate c, while the downtake chambers 1c are connected to the upper air space p through corresponding openings r Jformed in the up- @i per platform c, the lower ends oi the downtake chambers 7c being closed by the lower platform f as indicated at Figures l and 3.

The baille 'plates m form the inner walls ot the downtake chambers 7c and are disposed between the upper andV lower platforms e and j parallel with the baiie plates g soas to form the exhaust passages 0 which terminate in the vertical exhaust openings b in the outer casing, the baille plates m being slotted to form the vertical outlets n through whichV the downtake chambers lo are connected to the exhaust passages 0.

The improved ventilator may be designed and constructed so that the exhaust openings 80 are arranged eitherv laterally or ineach face oi the ventilator easing according to requirements. rlhus, in the construction illustrated at Figures l to d the casing t is designed so that the exhaust openings b are arranged in 35 pairs laterally of the casing, ln this construction flat vertical battle plates g and m are employed to form a rectangular uptake chamber L and straight exhaust passages 0 the ends or'I which terminate in the lateral pairs of exhaust openings The purpose of the air space g is to serve as a dust trap when no particular air currents are "assing through the ventilator, as for instance, when the vehicle is stationary 95- and there is no wind. `When air is exhausted V through the ventilator the updraft sets up eddy currents in the lower space g, by which any dust and the like, lodged therein is caught up and swept out of the ventilator.

In the construction' illustrated at Figures 5 and 6 the casing a is designed so that the exhaust openings b are arranged in each tace of the casing. For this purpose curved baffle plates g areemployed to form a diamond shapeduptake chamber 71 while the baille plates m forming the inner walls of the downtake chambers 7c are curved concentrically the arrangements of the outlet r casing provided with a with the baiile plates g so as to form curved exhaust passages o that terminate in the exhaust openings Z) in adjacent sides of the casing, such openings being vertically subdivided by the corners o of the central uptake chamber, asrindicated at Figure 6.

' In the construction illustrated in the drawings the ventilator is formed of sheet metal and is provided with a fianged base plate c that can be readily secured to the end of an uptake shaftL or opening of a railway vehicle or other structure by means of screws or in any other convenient manner.

Vhen the ventilator is in use air currents are directed through the exhaust passages 0, past the outlet apertures n and rapidly exhaust foul air through the ventilator, while openings in the inner walls In of the downtake chambers effectively prevents the entry of sparks, blacks, rain, the vehicle or structure to which the ventilator is itted.

I claim l. An exhaustV terred to,

ventilator of the kind recomprising a laterally perforated perforated base and subdivided internally by a pair of horizontally disposed platforms into upper and lower air spaces, and by vertical balle plates, between such platforms, into inner uptake and outer downtake chambers and exhaust passages, the latter having openings communicating with the downtake Chambers, and the uptake communicating with the downtake through the upper air spaces.

2. An exhaust ventilator according to claim l, in which the vertical battle plates are arranged in parallel relation between the upper andlower platforms and form transverse exhaust passages leading from the downtake chambers to the exterior of the ventilator through lateral openings in the casing substantially as hereinbefore described.

In testimony whereof I affix my signature.

GIVEN GILES.

dust and other impurities into 

